"Communicable" illnesses can also be described as "infectious" illnesses because they are caused by organisms that enter and multiply within the human body.
There are four ways that a communicable pathogen (the actual disease-causing agent,
e.g., germ) can be spread (also referred to as transmission):
1. air-borne: the pathogen is spread through the air
2. blood-borne: the pathogen is spread through contact with an infected person's blood
3. direct contact: the pathogen is spread through contact with the bodily fluids
(other than blood) of an infected person (e.g., saliva, vaginal secretions, semen, etc.)
4. vector transmission: a vector of some sort (e.g., a mosquito or other living creature) spreads the pathogen from one person to another
There are five types of communicable pathogens: bacteria, viruses, fungi, protozoa, and parasitic worms. On the following slides are basic definitions, examples of illnesses caused by these particular communicable pathogens, and proactive (preventive) and reactive
(treatment) options.
BACTERIA
Definition: One-celled microscopic organisms
Did you know that a single grain of soil can contain over 100 million bacteria organisms?
Examples:
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Meningitis
Conjunctivitis
Pharyngitis (sore throat)
Strep throat
Bronchitis
Pneumonia - a serious inflammation of the lungs, deadly to many annually
Toxic shock syndrome
Syphilis
Gonorrhea
Tuberculosis
In general, infection of any tissue or organ (any word ending in the suffix "-itis") means "bacterial infection of"
Treatment options:
● Antibiotic treatment. A word of caution: we have begun to use antibiotics too freely and certain bacteria have become resistant to certain antibiotics now. Similarly, antibiotic resistance is also resulting from many people
discontinuing a prescribed antibiotic when they begin to feel better (but the prescriptive period of time isn't complete yet).
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VIRUSES
Definition:The smallest of the pathogens that require living cells for survival and reproduction (e.g., true parasites!)
Examples:
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HIV/AIDS
Mononucleosis, sometimes referred to as the "kissing disease"
The flu, cold
Herpes
Gastrointestinal upsets
Measles
Chickenpox
Mumps
Rubella - causes only minor infection in children but can have serious consequences for a fetus!
● Smallpox
● Polio
Treatment options:
● Proactive (immunizations/ vaccinations)
● OR let it run its course and be patient (over-the-counter medicines will make you feel better while you're sick but they will not make you get well any quicker!) ●
FUNGI
Definition: Simple organisms that cannot make their own food
Examples:
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Candidiasis (yeast infections)
Thrush
Athlete's foot
"Jock itch" ringworm (disease of the scalp)
Treatment options:
● topical creams
● sprays
PROTOZOA
Definition: Microscopic, single-celled animals, larger than bacteria and have a more complex cellular structure
Examples:
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Malaria
African sleeping sickness
Amoebic dysentery
Trichomoniasis (vaginal infection)
Very common in Asia, Africa, and South America
Prevention: don't drink unclean water, basic sanitation practices
PARASITES
Description:organisms that live in or on another organism and derive nourishment from it
Examples of parasitic worms:
● Flukes (infect liver, intestines, and lungs and can be deadly in large numbers) ● Tapeworms (live in the intestines)
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● Roundworms (infect the intestines, muscles, and fluids under the skin)
Prevention: careful attention to hygiene and not eating/drinking food or drink that could be contaminated or not cooked thoroughly
**We don't catch colds from being outside when it's cold! You can go outside in 20 degree weather with no shoes on and your hair completely drenched and not necessarily "catch a cold!" Germs don't pick on people in such conditions!
You "catch a cold" from being infected by the cold germ/pathogen - NOT